Heart Anatomy
Love Hormones
Blood & Circulation
Animal Courtship
Medical Matters
100

This muscular organ pumps blood throughout the body

What is the heart?

100

This "love hormone" is released during hugging, childbirth, and bonding

What is oxytocin?

100

This type of blood vessel carries oxygen-rich blood away from the heart.

What is an artery?

100

This bird species is famous for its intricate dances and nest-building to attract mates.

What is the bowerbird?

100

High levels of this type of cholesterol can increase heart disease risk.

What is LDL (low-density lipoprotein)?

200

The heart has this many chambers

What is four?

200

Often associated with pleasure and reward, this neurotransmitter spikes when you see someone you love.

What is dopamine?

200

The universal donor blood type.

What is O negative?

200

The male of this insect species dies after mating, making it a one-time event.

What is the praying mantis?

200

This condition, also called hypertension, refers to consistently high blood pressure.

What is hypertension?

300

This valve prevents backflow between the left atrium and left ventricle.

What is the mitral (bicuspid) valve?

300

This hormone is responsible for the “butterflies” feeling of excitement and attraction.

What is adrenaline (epinephrine)?

300

This protein in red blood cells binds oxygen for transport.

What is hemoglobin?

300

Male seahorses perform this unique role in reproduction.

What is carrying and birthing the young?

300

A myocardial infarction is the medical term for this event.

What is a heart attack?
400

The largest artery in the body, responsible for carrying oxygen-rich blood from the heart.

What is the aorta?

400

Long-term love and attachment are linked to this hormone, which is also involved in stress.

What is vasopressin?

400

The heart pumps about this many liters of blood per minute.

What is 5-6 liters?

400

To attract a mate, male fireflies do this in specific patterns.

What is flashing their bioluminescent light?

400

This is the leading cause of death worldwide, often linked to poor heart health.

What is cardiovascular disease?

500

This part of the heart generates electrical impulses, acting as the natural pacemaker.

What is the sinoatrial (SA) node?

500

The decrease of this neurotransmitter during heartbreak can cause sadness and mood swings.

What is serotonin?

500

This blood component helps in clotting to prevent excessive bleeding.

What are platelets?

500

This species of penguin presents a pebble as a gift when choosing a mate.

What is the Adélie penguin?

500

This heart surgery is performed to restore blood flow when arteries are blocked.

What is a coronary bypass?